APA (7th ed.) Citation

Croneis, C., & Krumbein, W. C. (1936). Down to Earth: An introduction to geology. University of Chicago.

Chicago Style (17th ed.) Citation

Croneis, Carey, and William C. Krumbein. Down to Earth: An Introduction to Geology. Chicago: University of Chicago, 1936.

MLA (9th ed.) Citation

Croneis, Carey, and William C. Krumbein. Down to Earth: An Introduction to Geology. University of Chicago, 1936.